I wonder if it was the conception of this range to provide a unique decor to each piece If you look at the pic in the 1989 Skrdlovice Glassexport Anik linked to, both pieces on the left have the same PN, but even the shapes differ widely...

I was wondering the same thing. All three vases in the catalogue are different, yet two share the same pattern number. In the Beranek catalogue the 8803 has got an additional 'lip' at the top, making it another variation of the same piece.

I did manage to enlarge my Skrdlovice collection this week... since I bought a few pieces from Anik, I won't bother to repost them as she already mentioned them in this thread. But a found a variation of the 85 Roubicek. I don't think I would have noticed it at all if a similar piece hadn't been mentioned in this thread. Pattern 8526:

Rocco I may have been confused (none of us are always right!!!). Your estimation of a flip on this pattern may be correct. I was thinking of the similar pattern 5987 which you do see in blue, green, and topas etc, which is a larger vase, not this one. Davids' vase had confused me for a while because it is a flip-mirror of the pattern.... and does not seem to have the blue as illustrated in the pattern (unlike ours) but the variability of hand made production makes a variant of 5963 the best estimate I guess..... as the height is correct...... even though it is a mirror image of the shape.... this is seen occasionally.... apologies for any confusion.......